Financial statements and financial reports are your friend. From a company's annual report (10-K), which is the most important type of statement? Why? 
Optional: Depreciation is how a business uses its assets. Which depreciation method would you recommend using for a company you are familiar with? Name the company or note its industry. 
Inventory is the most important current asset of most retailers. Which inventory valuation method do you think is best for Macy's or Nordstrom's? For a technology firm like Intel or Cisco? For a large consulting or accounting firm?